part of somatic muscle cell CL:0008004 Somatic and visceral muscles appear striated (Miller, 1950). FBbt:00005073 Muscle cell that serves to change the position of some part of the body. These cells are usually attached to the body wall. Fibers of somatic muscles are multinucleate, with the contractile material grouped into fibrils. fly_anatomy.ontology skeletal muscle cell muscle cell syncytium somatic muscle